I got mine installed this weekend. Makes a HUGE difference in driveability of the truck. Mine does not enable DFM on deceleration, so I can actually decelerate in a controlled fashion going down hills! Braking is mich smoother as well when approaching a stoplight as the engine helps hold you back.
Overall very pleased. I am waiting to see what actually happens to mileage. Since disconnecting the battery the truck has to relearn the fuel map.
Also, the exhaust sounds much better. I have a Gibson with dual rear outlets. Not sure if it is attributable to the lack of DFM, or the ANC cancelling harness installed also over the weekend.
Anyway, I am very happy. One of the best improvements for this truck. I was hesitant, but I am glad I did it.